Lens heating device, bin body adopting lens heating device and equipment

Abstract

The utility model provides a lens heating device, a bin body adopting the lens heating device and equipment, the lens heating device comprises a film heating layer which is used for being in contact with a lens and heating the lens, the film heating layer comprises a heating resistor in the middle and insulating films wrapping the two sides, and one side of the film heating layer is attached to the lens. According to the lens heating device and the bin body adopting the lens heating device, the lens is heated in the mode that the heating resistor is clamped by the insulating film, the lens heating device can be installed by being attached to the end face of the lens, and the problems of fogging and icing phenomena occurring when the lens heating device is used in a scene with the low air temperature can be solved; according to the lens heating device, the bin body adopting the lens heating device and the equipment, the front end of the infrared lens can be exposed out of the bin body, the bin body structure is reduced, the weight is reduced, the lens heating device is sealed in the bin body, and the phenomenon that the service life of the lens heating device is shortened due to exposure of the lens heating device can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of lenses, and in particular, to a lens heating device, a housing and a device using the lens heating device. Background Art

[0002] In order to avoid fogging and icing of the infrared core and visible light core in security devices in winter usage scenarios, the current existing security devices solve the above problems through a lens heating structure. The general solution currently adopted is to arrange the heating device inside the closed housing of the security device, and the heating device is fixed on the outer ring of the lens by a method of combining a silicone rubber heating plate with a spring.

[0003] For an infrared lens, the structure generally has a large front-end structure size and a small rear-end structure size. To meet the requirement of miniaturization of security devices, the housing of the security device is designed such that the front end of the infrared lens protrudes from the housing and is fixed in a form of a lens flange. The above-mentioned assembly method of the infrared lens cannot use the heating device fixed on the outer ring of the lens by combining a silicone rubber heating plate with a spring. In addition, the method of combining a silicone rubber heating plate with a spring for the existing heating device has certain requirements for the lens shape and requires a sufficient cylindrical surface for installation; in a harsh impact and vibration environment, there is also a risk of the silicone rubber heating plate falling off.

[0004] Therefore, there is an urgent need to provide a heating device suitable for infrared lenses to solve the above problems. Summary of the Invention

[0005] To solve the existing technical problems, the present application provides a lens heating device, a housing and a device using the lens heating device, which can realize the quick disassembly and assembly of a front-mounted infrared imaging device.

[0006] To achieve the above object, the technical solution of the embodiment of the present application is realized as follows:

[0007] On the one hand, the embodiment of the present application provides a lens heating device, which includes a thin film heating layer for contacting the lens and heating the lens. The thin film heating layer includes a heating resistor in the middle and insulating films wrapped on both sides, and one side of the thin film heating layer is attached to the lens.

[0008] In one embodiment, the shape of the thin film heating layer is circular or semi-circular.

[0009] In one embodiment, a power supply transmission cable is provided outside the thin film heating layer, and the heating resistor is powered through the power supply transmission cable.

[0010] In one embodiment, a temperature sensor for detecting the temperature of the lens is provided on the side of the thin film heating layer attached to the lens, and the heating resistor avoids the temperature sensor.

[0011] In one embodiment, a foam layer and an adhesive layer are provided on the other side of the thin film heating layer, and the foam layer and the adhesive layer have the same shape.

[0012] In one embodiment, a drive circuit board is provided for controlling the thin film heating layer. The drive circuit board is electrically connected to the thin film heating layer and adjusts the power of the heating resistor.

[0013] On the other hand, an embodiment of the present application provides a cartridge using the lens heating device described above, including a lens, a cartridge front cover, a cartridge housing, and a cartridge front cover flange; the cartridge front cover and the cartridge housing cooperate to form an accommodation space, the lens is installed in the accommodation space and protrudes from the cartridge front cover; the cartridge front cover flange covers the outer circle of the lens to fix the lens to the cartridge front cover; the lens heating device is disposed between the lens and the cartridge front cover.

[0014] In one embodiment, the lens is provided with an edge with an enlarged size. The surface of the enlarged edge facing the cartridge front cover flange is the lens mounting surface, and the cartridge front cover flange is pressed against the lens mounting surface; the surface of the enlarged edge facing the cartridge front cover is the lens heating surface, and the lens heating device is attached to the lens heating surface.

[0015] In one embodiment, a first sealing groove and a heating device placement groove are respectively formed at one end of the cartridge front cover facing the lens heating surface. A sealing ring is installed in the first sealing groove, and the lens heating device is pasted in the heating device placement groove. The heating device placement groove is disposed inside the first sealing groove.

[0016] In one embodiment, the sinking dimension of the heating device placement groove is 20% to 30% of the foam compression amount of the foam layer of the lens heating device.

[0017] In one embodiment, the heating device placement groove 33 is respectively provided with a temperature sensor avoidance opening and a power supply transmission cable opening at positions corresponding to the temperature sensor and the power supply transmission cable of the thin film heating layer. The temperature sensor is received in the temperature sensor avoidance opening, and the power supply transmission cable passes through the power supply transmission cable opening; both the temperature sensor avoidance opening and the power supply transmission cable opening are disposed inside the first sealing groove.

[0018] In yet another aspect, an embodiment of the present application provides a device including the cartridge described above.

[0019] The lens heating device, the housing and the equipment adopting the lens heating device of the present application at least have the following beneficial effects: In the lens heating device, the housing and the equipment adopting the lens heating device of the present application, the lens is heated by using an insulating film sandwiching a heating resistor, which can be installed by fitting to the end face of the lens, and can solve the problems of fogging and icing in the scenario of low temperature; the lens heating device, the housing and the equipment adopting the lens heating device of the present application can expose the front end of the infrared lens outside the housing. While reducing the housing structure and lightening the weight, the lens heating device is sealed inside the housing, which can avoid the reduction of its service life caused by the exposure of the lens heating device. Description of the Drawings

[0020] Figure 1 Stereo exploded view of the lens heating device according to an embodiment of the present application;

[0021] Figure 2 Stereo exploded view of the housing adopting the lens heating device according to an embodiment of the present application;

[0022] Figure 3 is Figure 2 Enlarged stereo view of the front cover of the housing in

[0023] Figure 4 is Figure 3 Enlarged stereo view of another angle of the front cover of the housing in

[0024] The reference numerals of each component in the figure are as follows:

[0025] Lens heating device 10 (wherein, film heating layer 11, foam layer 12, adhesive layer 13; temperature sensor 111, power supply transmission cable 112);

[0026] Lens 20 (wherein, lens mounting surface 21, lens heating surface 22);

[0027] Front cover of the housing 30 (wherein, first sealing groove 31, temperature sensor avoidance opening 32, heating device placement groove 33, power supply transmission cable opening 34, second sealing groove 35);

[0028] Housing shell 40; flange of the front cover of the housing 50; sealing ring 60; gasket 70. Detailed Description of the Embodiment

[0029] The technical solution of the present application will be further elaborated in detail below in conjunction with the drawings of the specification and specific embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms used in the description of this application are for the purpose of describing specific embodiments only and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. In the description of this application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0032] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0033] Please refer to Figure 1 , the lens heating device 10 of an embodiment of this application is used to heat an infrared lens to prevent fogging, icing and other phenomena in a usage scenario with a relatively low temperature. The lens heating device 10 includes a thin film heating layer 11, a foam layer 12 and an adhesive layer 13. One side of the thin film heating layer 11 is used to contact the lens and heat the lens, and the other side of the thin film heating layer 11 can be pasted and fixed through the foam layer 12 and the adhesive layer 13. One side of the foam layer 12 is pasted to the thin film heating layer 11, and the other side of the foam layer 12 is pasted to the adhesive layer 13. The foam layer 12 and the adhesive layer 13 have the same shape, so that the thin film heating layer 11 is closely attached and installed.

[0034] Specifically, the thin film heating layer 11 has a shape similar to the outer ring at the front end of the lens, and is internally provided with a heating resistor to heat the lens. The shape of the thin film heating layer 11 is circular or semi-circular, and the circular or semi-circular shape can uniformly and effectively heat the lens. In the illustrated embodiment, the thin film heating layer 11 is circular. More specifically, the thin film heating layer 11 is formed by a heating resistance wire or a heating resistance sheet in the middle and insulating films wrapped on both sides, and both sides of the heating resistance wire or the heating resistance sheet in the middle are insulated and protected by the insulating films. The insulating film can be a material that meets the insulation requirements such as polyimide film material.

[0035] The thin film heating layer 11 is provided with a temperature sensor 111 on the side attached to the lens, and the temperature sensor 111 is used to detect the temperature of the lens. No heating resistance wire or heating resistance sheet is arranged around the temperature sensor 111, that is, the heating resistance avoids the temperature sensor 111. A heat-conducting copper sheet is covered on the back of the temperature sensor 111, and the heat-conducting copper sheet is directly in contact with the lens (the heated lens surface) to measure the temperature of the lens. By detecting the temperature of the lens through the temperature sensor 111, it is possible to prevent the heating resistor in the thin film heating layer 11 from continuing to heat when the lens temperature is relatively high, thereby avoiding overheating and even burning out of the heating resistor.

[0036] A power supply transmission cable 112 is further provided outside the thin film heating layer 11, and the heating resistor in the middle is powered by the power supply transmission cable 112.

[0037] Corresponding to the temperature sensor 111 and the power supply transmission cable 112, the foam layer 12 and the adhesive layer 13 are respectively provided with notches at corresponding positions, so that the foam layer 12 and the adhesive layer 13 are in the shape of two symmetrically arranged semi-circular rings.

[0038] The lens heating device 10 is further provided with a driving circuit board (not shown in the figure), and the driving circuit board is used to control the thin film heating layer 11. The temperature sensor 111 and the power supply transmission cable 112 on the thin film heating layer 11 are both electrically connected to the driving circuit board.

[0039] In the above-mentioned lens heating device 10, one side of the foam layer 12 is pasted to the thin film heating layer 11, the other side of the foam layer 12 is pasted to the adhesive layer 13, and the adhesive layer 13 can be pasted to the structural member, so as to paste the lens heating device 10 to the structural member and press it tightly against the lens. The thin film heating layer 11 in the lens heating device 10 generates heat after the heating resistance wire in the middle is powered by the power supply transmission cable 112 to heat the lens in close contact; the temperature sensor 111 detects the temperature of the lens in real time and adjusts the thin film heating layer 11 accordingly, which can prevent the lens from fogging, icing, etc. in the usage scenario with relatively low temperature, thus ensuring the normal operation of the lens.

[0040] Please refer to Figure 2, the chamber body adopting the lens heating device 10 in an embodiment of the present application further includes a lens 20, a front cover 30 of the chamber body, a chamber body housing 40, and a flange 50 of the front cover of the chamber body. Among them, the front cover 30 of the chamber body is matched with the front end of the chamber body housing 40 to form an accommodation space inside; the lens 20 is installed in the accommodation space formed by the front cover 30 of the chamber body and the chamber body housing 40, and the front end protrudes forward from the front cover 30 of the chamber body; the flange 50 of the front cover of the chamber body is closed from the front end to the outer circle of the front end of the lens 20, so as to install and fix the lens 20 to the front cover 30 of the chamber body.

[0041] Specifically, the front end of the lens 20 is provided with an edge with an enlarged size for the installation and fixation of the lens 20. More specifically, the outwardly expanded edge at the front end of the lens 20 is fixed between the front cover 30 of the chamber body and the flange 50 of the front cover of the chamber body. The surface of the outwardly expanded edge at the front end of the lens 20 facing the flange 50 of the front cover of the chamber body at the front end is the lens mounting surface 21, which is used for the flange 50 of the front cover of the chamber body to be pressed and fixed to the front cover 30 of the chamber body; the surface of the outwardly expanded edge at the front end of the lens 20 facing the front cover 30 of the chamber body is the lens heating surface 22, which is used for the lens heating device 10 to be attached thereto and heat the lens 20.

[0042] The lens heating device 10 is arranged between the lens heating surface 22 of the lens 20 and the front cover 30 of the chamber body, that is, the rear end of the lens heating device 10 is pasted to the front end of the front cover 30 of the chamber body through the adhesive layer 13 and pressed by the lens heating surface 22. A sealing ring 60 is provided between the lens 20 and the front cover 30 of the chamber body to achieve the seal between the lens 20 and the front cover 30 of the chamber body; a gasket 70 is provided between the front cover 30 of the chamber body and the chamber body housing 40 to achieve the seal between the front cover 30 of the chamber body and the chamber body housing 40.

[0043] Please refer to Figure 3 , to further facilitate the installation of the lens heating device 10, the front end of the front cover 30 of the chamber body facing the lens heating surface 22 is respectively provided with a first sealing groove 31 and a heating device placement groove 33. Among them, the first sealing groove 31 is used to install the sealing ring 60, and the heating device placement groove 33 is used to install the lens heating device 10. The heating device placement groove 33 is used to paste the lens heating device 10, playing a role in fixing and positioning. The sinking dimension of the heating device placement groove 33 is designed according to the foam compression amount of the foam layer 12 of the lens heating device 10 and the total thickness of the lens heating device 10. Generally, it is better to take the thickness of 20% to 30% of the foam compression amount.

[0044] The heating device placement groove 33 is respectively provided with a temperature sensor avoidance opening 32 and a power supply transmission cable opening 34 at positions corresponding to the temperature sensor 111 and the power supply transmission cable 112. When the lens heating device 10 is installed in the heating device placement groove 33, the temperature sensor avoidance opening 32 avoids the temperature sensor 111 so that the temperature sensor 111 is received in the temperature sensor avoidance opening 32. The power supply transmission cable opening 34 is used for the lens heating device 10 to route the cable. The power supply transmission cable 112 passes through the power supply transmission cable opening 34 and extends into the housing shell 40 to be connected to the power supply. It should be noted that the heating device placement groove 33, the temperature sensor avoidance opening 32 and the power supply transmission cable opening 34 are all required to be arranged inside the first sealing groove 31, so as to place the entire lens heating device 10 within the sealing ring 60, and effectively seal the lens heating device 10.

[0045] Please refer to Figure 4 , the front cover 30 of the housing is provided with a second sealing groove 35 at the rear end facing the housing shell 40, and the second sealing groove 35 is used to accommodate the gasket 70.

[0046] The above-mentioned housing is provided with a driving circuit board for controlling the thin film heating layer 11. The driving circuit board is installed in the housing shell 40. The temperature sensor 111 and the power supply transmission cable 112 on the thin film heating layer 11 are both electrically connected to the driving circuit board. More specifically, according to different working environments (ambient temperatures) such as fog, frost, and ice, the control chip on the driving circuit board can respectively set the defogging working mode, defrosting working mode, deicing working mode, etc. for the lens heating device 10. Corresponding to different working modes, the lens heating device 10 adjusts the corresponding heating power (the power of the heating resistor) of the thin film heating layer 11 under the control of the control chip (through an external host computer) through the power supply transmission cable 112. Taking an infrared lens as an example, in the deicing working mode, the driving circuit board can set the heating power of the heating resistor of the thin film heating layer 11 to 45 watts to deice the infrared lens.

[0047] The installation process of the chamber body adopting the lens heating device 10 is as follows: After placing the gasket 70 in the second sealing groove 35, the front cover 30 of the chamber body is fixed to the front end of the chamber body housing 40 by screws (not labeled); the lens heating device 10 is pasted into the heating device placement groove 33 on the front cover 30 of the chamber body, so that the temperature sensor 111 and the power supply transmission cable 112 are respectively aligned with the temperature sensor avoidance opening 32 and the power supply transmission cable opening 34; the sealing ring 60 is placed in the first sealing groove 31; the front cover flange 50 of the chamber body installs the lens 20 onto the front cover 30 of the chamber body by screws (not labeled), and the lens heating surface 22 on the back of the lens 20 compacts the foam layer 12 of the lens heating device 10, and then closely adheres to the lens heating device 10, which can realize the heating of the front end of the lens 20 and the detection of the temperature at the front end of the lens 20. After the installation is completed, the lens 20 and the front cover 30 of the chamber body are sealed with the sealing ring 60; the front cover 30 of the chamber body and the chamber body housing 40 are sealed with the gasket 70.

[0048] The present application further provides a device including the above chamber body. The device can be a security device, a night vision device, or other devices that require the use of an infrared lens. In addition to the above chamber body with an infrared lens, the device may further include another chamber body with a visible light lens. The infrared lens chamber body and the visible light lens chamber body are both arranged on the pan-tilt, and the shooting angles of the infrared lens chamber body and the visible light lens chamber body are adjusted through the pan-tilt.

[0049] In summary, the lens heating device of the present application heats the lens by using the method of sandwiching a heating resistor with an insulating film, can be attached to the end face of the lens to heat the lens, and can solve the problems of fogging and icing that occur when used in scenarios with relatively low temperatures, thereby expanding the working temperature range of the lens; in addition, the lens heating device can accurately detect the lens temperature and can avoid the influence on the lens imaging caused by overheating. The lens heating device, the chamber body adopting the lens heating device, and the device of the present application can realize that the front end of the infrared lens is exposed outside the chamber body. While reducing the chamber body structure and reducing the weight, the lens heating device is sealed inside the chamber body, which can avoid the reduction of the service life caused by the exposure of the lens heating device.

[0050] It should be noted that in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0051] As described above, it is only the specific implementation manner of the present application. However, the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims described above.

Claims

1. A lens heating device, characterized in that: The lens heating device (10) comprises a thin film heating layer (11) for contacting the lens and heating the lens, the thin film heating layer (11) comprising a heating resistor in the middle and insulating films wrapped on both sides, and one side of the thin film heating layer (11) is in contact with the lens.

2. The lens heating device according to claim 1, characterized in that: The thin film heating layer (11) is in the shape of a circular ring or a semi-circular ring.

3. The lens heating device according to claim 1, characterized in that: A power transmission cable (112) is provided outside the thin film heating layer (11), and the heating resistor is powered by the power transmission cable (112).

4. The lens heating device according to claim 1, characterized in that: The thin film heating layer (11) is provided with a temperature sensor (111) for detecting the temperature of the lens on the side in contact with the lens, and the heating resistor is away from the temperature sensor (111).

5. The lens heating device according to claim 1, characterized in that: A foam layer (12) and a back adhesive layer (13) are provided on the other side of the thin film heating layer (11); the foam layer (12) and the back adhesive layer (13) have the same shape.

6. The lens heating device according to claim 1, characterized in that: A driving circuit board for controlling the thin film heating layer (11) is provided; the driving circuit board is electrically connected to the thin film heating layer (11) and adjusts the power of the heating resistor.

7. A chamber body using the lens heating device according to any one of claims 1 to 6, characterized in that: The invention comprises a lens (20), a bin front cover (30), a bin shell (40) and a bin front cover flange (50); the bin front cover (30) cooperates with the bin shell (40) to form a storage space, the lens (20) is installed in the storage space and protrudes from the bin front cover (30); the bin front cover flange (50) covers the outer ring of the lens (20) to fix the lens (20) to the bin front cover (30); the lens heating device (10) is arranged between the lens (20) and the bin front cover (30).

8. The chamber body with the lens heating device according to claim 7, characterized in that: The lens (20) is provided with an outwardly expanded edge, and the side of the outwardly expanded edge facing the warehouse front cover flange (50) is the lens mounting surface (21), and the warehouse front cover flange (50) is pressed against the lens mounting surface (21); the side of the outwardly expanded edge facing the warehouse front cover (30) is the lens heating surface (22), and the lens heating device (10) is attached to the lens heating surface (22).

9. The chamber body using the lens heating device according to claim 8, characterized in that: A first sealing groove (31) and a heating device placement groove (33) are respectively formed on one end of the chamber front cover (30) facing the lens heating surface (22); a sealing ring (60) is installed in the first sealing groove (31); the lens heating device (10) is pasted in the heating device placement groove (33); and the heating device placement groove (33) is arranged on the inner side of the first sealing groove (31).

10. The chamber body with the lens heating device according to claim 9, characterized in that: The sinking dimension of the heating device placement groove (33) is 20% to 30% of the foam compression amount of the foam layer (12) of the lens heating device (10).

11. The chamber body with the lens heating device according to claim 9, characterized in that: The heating device placement groove (33) is provided with a temperature sensor avoidance opening (32) and a power transmission cable opening (34) at positions corresponding to the temperature sensor (111) and the power transmission cable (112) of the thin film heating layer (11), respectively; the temperature sensor (111) is accommodated in the temperature sensor avoidance opening (32), and the power transmission cable (112) passes through the power transmission cable opening (34); the temperature sensor avoidance opening (32) and the power transmission cable opening (34) are both arranged on the inner side of the first sealing groove (31).

12. A device, characterized in that: Comprising a warehouse body according to any one of claims 7 to 11.

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